Lifting device for reducing stroke resistance of sucker rod
A lifting device, sucker rod technology, applied in components of pumping devices for elastic fluids, pulse balance, pumps with flexible working elements, etc., can solve the lack of liquid hammer phenomenon, the neutral point of the plunger effect and other problems, to achieve the effect of extending the maintenance period, simplifying the structure, and facilitating installation and disassembly
Active Publication Date: 2022-05-03
TIANJIN YIZHANG PETROLEUM TECH DEV CO LTD
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Problems solved by technology
[0003] In view of this, the present invention aims to propose a lifting device that reduces the stroke resistance of the sucker rod, so as to solve the problems in the existing field of oil production, such as the liquid hammer phenomenon, the plunger effect, and the neutral point in the pumping unit.
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[0034] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0035] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood ...
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The invention provides a lifting device for reducing the stroke resistance of a sucker rod, which comprises a main working barrel, the upper end and the lower end of the main working barrel are connected with oil pipes, the sucker rod with the lower end connected with a plunger is arranged in the main working barrel, the sucker rod drives the plunger to vertically move in the main working barrel, and the main working barrel is correspondingly provided with an auxiliary working barrel. A one-way communicating structure from bottom to top is arranged in the plunger and between the lower end of the auxiliary working barrel and the adjacent oil pipe and between the lower end of the main working barrel and the adjacent oil pipe, the upper end of the auxiliary working barrel is communicated with the upper end of the main working barrel, and the lower end of the auxiliary working barrel is communicated with the lower end of the main working barrel. According to the lifting device capable of reducing the stroke resistance of the sucker rod, the auxiliary working barrel is arranged corresponding to the main working barrel, ascending pressure maintaining and descending pressure releasing are achieved, the plunger effect, the liquid impact phenomenon and the rod column neutral point occurring in the reciprocating motion process of the plunger are eliminated, stroke loss generated by bending of the sucker rod is eliminated, and the stroke resistance of the sucker rod is reduced. Eccentric wear among the sucker rod, the main working barrel and the oil pipe wall is eliminated, the service life of each part is prolonged, and the overhaul period is prolonged.
Description
technical field [0001] The invention belongs to the field of oil extraction technology, in particular to a lifting device for reducing the stroke resistance of a sucker rod. Background technique [0002] At present, the oil well pump, the main device used to lift the wellbore liquid to the surface in the world's oil production technology field, has three fatal defects: 1. "Liquid hammer" phenomenon: when the plunger moves up to the apex in the pump barrel and starts to descend violently 2. Plunger effect: the downward speed of the plunger is lower than the downward speed of the rod, resulting in asynchronous, forming the bending of the rod and the inner wall of the working cylinder and the oil pipe. Friction; 3. Neutralization point: when the sucker rod goes down, due to the downward resistance ("liquid hammer" phenomenon, plunger effect), the lower part of the rod column will be reversely compressed, and the section where the pressure is zero It is the neutral point, and b...
Claims
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IPC IPC(8): F04B53/10F04B53/12F04B11/00F04B53/16F04B47/02
CPCF04B53/1002F04B53/126F04B11/00F04B53/16F04B47/02
Inventor 陈建军张栋
Owner TIANJIN YIZHANG PETROLEUM TECH DEV CO LTD